checkboxes in uitableview are giving errors - iphone

Question

I have 2 sections and I am trying to make it so when you click the checkbox of a cell in one of the sections, it goes to the other section (ex: section 1->section 2)
here is some relevant code of mine:
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"UITableViewCell"];
if (!cell)
cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:#"UITableViewCell"];
if([indexPath section] == 0){
cell.textLabel.text = [[[taskArray objectAtIndex:[indexPath row]] taskName] uppercaseString];
cell.imageView.image = [UIImage imageNamed:#"checkboxtry2.png"];
} else if ([indexPath section] == 1) {
cell.textLabel.text = [[[completedArray objectAtIndex:[indexPath row]] taskName] uppercaseString];
cell.imageView.image = [UIImage imageNamed:#"checkboxtry2selected.png"];
}
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:#selector(handlechecking:)];
[cell.imageView addGestureRecognizer:tap];
cell.imageView.userInteractionEnabled = YES;
return cell;
}
-(void)handlechecking:(UITapGestureRecognizer *)t{
CGPoint tapLocation = [t locationInView:self.tableView];
NSIndexPath *tappedIndexPath = [self.tableView indexPathForRowAtPoint:tapLocation];
NSIndexPath *newIndexPath = nil;
if (tappedIndexPath.section == 0) {
[completedArray addObject:[taskArray objectAtIndex:tappedIndexPath.row]];
[taskArray removeObject:[taskArray objectAtIndex:tappedIndexPath.row]];
newIndexPath = [NSIndexPath indexPathForRow:tappedIndexPath.row inSection:1];
}
else {
[taskArray addObject:[completedArray objectAtIndex:tappedIndexPath.row]];
[completedArray removeObject:[completedArray objectAtIndex:tappedIndexPath.row]];
newIndexPath = [NSIndexPath indexPathForRow:tappedIndexPath.row inSection:0];
}
[self.tableView beginUpdates];
[self.tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:newIndexPath] withRowAnimation:UITableViewRowAnimationNone];
[self.tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:tappedIndexPath] withRowAnimation:UITableViewRowAnimationNone];
[self.tableView endUpdates];
}
I have two arrays: taskArray which handles objects in section 0 and completedArray which handles objects in section 1.
I am getting the error * Terminating app due to uncaught exception 'NSRangeException', reason: '* -[__NSArrayM objectAtIndex:]: index 0 beyond bounds for empty array'

Answer 1

2 things.
You are adding gesture recognisers repeatedly to your table view cells even when they have been re-used and already have one.
Also in your gesture recogniser target you could do something like this which might be more reliable:
UITableViewCell *cell = [[t.view superview] superview];
NSIndexPath *indexPath = [self.tableView indexPathForCell:cell];